Bookbinding.



D; Z. HOWELL.

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APPLICATION TILED 11113.17, 1908.

' 928,518. Patented July 20, 1909.

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U N ITEI) STATES PATENT OFFICE.

DAVID ZOPHAR HOWELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOSHUA R. JONES, OF PHILADELPHIA, PENNSYLVANIA.

BOOKBINDING.

To all whom it may concern:

Be it known that I, DAVID ZOPHAR HOWELL, citizen of the United States, residing in the city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Bookbinding, ofwhich the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to bookbinding and has for its object the provision of simplified method and means for spacing the sigma tures or sections of leaves in blank books used for removably mounting post cards and the like on the several pages or leaves thereof.

To these ends my invention consists in the method and the product thereof, hereinafter described, of folding a piece of paper into a signature or section of two leaves in such manner that a spacing strip, integral with each signature is provided between its two leaves and an additional spacing strip, also integral with the same signature and lying between said signature, of which it forms a part, and the next contiguous signature when the signatures are assembled in series.

In the accompanying drawings illustrating my invention, Figure 1 is an exaggerated end elevation of a sheetof paper, with its first fold, adapted to form a signature of two leaves; Fig. 2 is a like view of the same, given its second fold; Fig. 3 a like view of same, given its third and final fold; and Fig. 4 a like view of a plurality of such signatures arranged in series ready for sew ing or otherwise mounting to form a book.

Blank books of this class, with spacing strips, as heretofore made, are provided with spacing strips consisting of narrow strips of paper or cloth, separate from the leaf or leaves and folded over the rearward or bound-in edge of the leaf; and this method of spacing the leaves entails considerable labor and expense in assembling and uniting the spacing strips to the leaves. In my new method and product the spacing strips are integral with each pair of leaves and the sheet is so folded as to form such section of a pair of leaves with such spacing strip not only between the two leaves thereof but with an additional spacing strip extending on the outer side of one of said leaves, the last folded edge of the additional and exterior spacing strip forming a binding edge, hence when a number of such signatures are as- Specification of Letters Patent.

Application filed. March 17, 1908.

Patented July 20, 1909,

Serial No. 421,677.

sembled in series there will be a spacing strip between each two contiguous leaves and integral with each contiguous pair of leaves, forming asignature or section.

Referring now to said drawings, Fig. 1 shows, in edge elevation, a sheet of paper given its first fold to form a signature of two integral leaves 1 and 2; and this fold is to be such that one leaf, indicated at 1 in Fig. 1, is wider in the first instance than the other leaf, to the extent of the part indicated at 1 which projects beyond the edge 5 of the leaf 2, in order to supply material out of which a spacing strip 4 is to be formed between the leaves of the signature. The extent of this projection 1 of leaf 1 beyond the edge of leaf 2 is governed by the width tobe given to strip 4, this being so whether the exterior and additional spacing strip 4:, hereinafter described, be formed or not. The spacing strip 4, between the two leaves of each signature, is formed by folding the leaf 1 on itself, which also brings the edges 5, 5 of the two leaves 1 and 2 into register, as shown in Fig. 2, and in so folding the leaf 1 upon itself, it is preferred to make the fold in such part of the length of leaf 1 as to bring its binding edge below the binding edge of leaf 2, so as to form the part 3 thereof projecting beyond the binding edge of leaf 1, as shown in Fig. 2. In order to. cause the back or binding edges of the two leaves of the signature to register and also to supply an additional spacing strip, integral with each signature, and overlapping the leaf 1 thereof, the projecting portion 3 of the fold in the leaf 2 (see Fig. 2) is then itself foldedover the leaf 1 toform such outside and additional spacing strip 4: and with the folded edge thereof forming a binding edge for both leaves, as shown in Fig. 3, which completes the signature, and a plurality of these are then assembled as shown in Fig. 4 to form a series or book of such spaced leaves.

Having thus, described my invention, I claim as new and desire to secure by Letters Patent j 1. In bookbinding, a series of two-leaf signatures, each signature composed of a single sheet folded to provide an independent binding edge for each leaf and a spacing strip of two thicknesses only, which is integral at the fold of the strip and interposed between said leaves of the signature.

2. In bookbinding a signature of two leaves composed of a single folded sheet having two integral spacing strips formed from the same sheet, one of said strips lying between the leaves of the signature and the other on the exterior of one of said leaves and coincident with its binding edge.

3. In bookbinding, a series of signatures of two leaves each, each of said signatures being composed of a single folded sheet having an integral spacing strip lying between the leaves of such signature, and another spacing strip integral with one of the same signatures and exterior to one of the leaves thereof, said signatures being assembled in V series with one of the said exterior spacing strips lying between each two contiguous signatures.

4. In bookbinding the method described of forming signatures of two leaves with an integral spacing strip between the leaves and another integral strip exterior to oneleaf of the signature, said method consisting in first folding a single sheet to form two leaves of unequal width, then folding the wider of said leaves to form an integral spacing strip between the leaves and also provide a strip projecting from one of said leaves beyond the folded edge of the adjoining leaf, and finally folding said projecting strip over the adjoining leaf to form a second spacing strip lying exterior of the first folded leaf and coincident-with the binding edge thereof.

In testimony whereof, I have hereunto affixed my signature this 12th day of March A. D. 1908.

DAVID ZOPHAR HOWELL, lVitnesses A. M. BIDDLE, JAMES A. TAYLOR. 

